546462 五、 發明說明 ( 1； [ 發 明 所 屬 技 術 領 域 ] 本 發 明 係 有 關 熱 交 換 器 用 扁 平 管 之 內 部 散 埶 片 、 以 及 使 用 該 內 部 散 熱 片 且 作 爲 如 汽 車 用 空 氣 調 節 器 之 蒸 發 器 所 用 之 蒸 發 器 〇 [ 習 知 技 術 】 於 汽 車 用 空 氣 調 節 器 之 蒸 發 器 中 習 知 上 係 藉 由 於 該 扁 平 管 內 配 設 內 部 散 熱 片 以 擴 大 冷 煤 端 之 傳 熱 面 積 5 藉 此 而 可 達 到 提 昇 性 能 之 S 的 〇 此 種 內 部 散 熱 片 於 習 知 上 係 由 橫 斷 面 爲 波 形 之 金 屬 板 所 形 成 並 收 容 於 扁 平 管 內 且 全 數 山 頂 部 及 全 數 谷 底 部 係 爲 焊 接 於 扁 平 管 內 面 之 物 〇 在 上 述 之 內 部 散 熱 器 中 5 係 藉 由 將 山 頂 部 與 谷 底 部 之 間 隔 - 亦 即 爲 散 熱 片 節 距 細 小 化 以 達 到 傳 熱 面 積 擴 大 之 的 ， 然 而 超 越 S 刖 之 散 熱 片 節 距 之 細 小 化 在 製 作 上 形 成 爲 困 難 此外 即 便 可 達 到 更 爲 細 小化 之 程 度 ? 明 顯 的 也 te j w\ 法 達 到 相 對 於 更 細 小 化 之 效 果 〇 本 發 明 之 的 係 爲 ， 提 供 一 種 藉 由 橫 斷 面 爲 波 形 之 金 屬 板 所 形 成 之 熱 交 換 器 用 扁 平 管 之 內 部 散 熱 片 即 使 未 將 散 熱 片 節 距 細 小化 卻 可 更 爲 提 升 熱 傳 達 效 率 之 物 Ο 本 發 明 之 另 一 S 的 係 爲 藉 由 使 用 上 述 內 部 散 熱 片 而 提 供 一 種 性 能 更 爲 提 昇 之 蒸 發 器 〇 [ 發 明 之 開 示 ] 藉 由 本 發 明 所 達 成 之 熱 交 換 -3 器 用 扁 平 管 之 內 部 散 熱 片 7 546462 五、發明說明（2) 係爲由橫斷面爲波形之金屬板所形成，並收容於扁平管內 ’且全數山頂部及全數谷底部係爲焊接於扁平管內面之物 ’其特徵在於，全數山頂部及全數谷底部中至少任何一個 i： ’設置有朝向與該等被焊接端之相反端之亂流促進用凸 部，亂流促進用凸部係爲，將形成於該裏側之凹部與扁平 管內面之間所產生的間隙，具有得以藉由焊接材料封塞之 大小之物。 如此，倘若於內部散熱片之全數山頂部及全數谷底部中 至少任何一個上，設置有朝向與該等被焊接端之相反端之 亂流促進用凸部，該內部散熱片所收容之扁平管內流動之 流體，係藉由亂流促進用凸部而以亂流狀態促進流動，藉 此，提昇熱傳達效率。並且，亂流促進用凸部係爲，將形 成於該裏側之凹部與扁平管內面之間所產生的間隙，具有 得以藉由焊接材料封塞之大小之物，因此，藉由內部散熱 片而於扁平管內形成於寬度方向成並列狀之各個多數流體 通路並非形成已連通之狀態，故流通抵抗將無法增大。從 而，藉由本發明，即使未將散熱片節距細小化，亦可藉由 亂流促進用凸部而提昇熱傳達效率，而可獲得更高性能之 熱交換器用扁平管之內部散熱片。 此外，藉由亂流促進用凸部而可獲得次要之效果，係列 舉如下。亦即，由金屬板所形成之內部散熱片係爲，將多 數枚於以上下積疊的狀態下暫時性地保管，然而，當各個 內部散熱片緊密接著後將難以剝離，而有在熱交換器之組 546462 五、 發明說明 ( 3) 裝 作 業 時 產 生 故障 之虞。倘 若 於內部散熱片 中 設 置 有 如 上 所 述 之 亂 流 促 進用 凸部，即使 是在將多數枚 於 以 上 下 積 疊 的 狀 態 下 因 各個 內部散熱 片 不致緊密接著 可 一 枚 — 枚 地 取 出 內 部 散 熱片 ，而可進 行 效率爲佳之熱 交 換 器 之 組 裝 作 業 0 此外 若由 此種內部 散 熱片之防止緊 密 接 著 效 果 之 特 點 來 說 亂 流促 進用凸部 係 爲，至少設置 在 位 於 內 部 散 側 片 之 兩 端 緣 部附 近之山頂 部 及/或谷底部 者 爲 佳 ， 藉 此 將 形 成 可 容 易 地一 枚一枚剝 除 呈堆積重疊狀 態 之 多 數 枚 內 部 散 熱 片 〇 於 本 發 明 之 熱交 換器用扁 平 管之內部散熱 片 中 ， 最 佳 爲 亂 流 促 進 用 凸部之內部散熱片長度方向 之 尺 寸 爲 1 1 . 5mm， 該凸部之高度爲0.2 ) 0.4mm 〇 亂 流 促 進 用 凸部之內部散熱片長度方向. 之 尺 寸 若 未 達 1 mm ! ，且該凸部之高度未達 0. 2mm時，將不 會 產 生 有 助 於 提 昇 熱 傳 達 效 率之 程度的流 體 亂流。另一方 面 > 亂 流 促 進 用 凸 部 之 內 部 散熱 片長度方 向 之尺寸若超過 1 .5 mm y 且 該 凸 部 之 筒 度 超 過0 .4mm 時， 形 成於亂流促進 用 凸 部 裏 側 之 凹 部 與 扁 平 管 內面 之間所產 生 的間隙，將無 法 藉 由 焊 接 材 料 進 行封 塞 之 虞， 因而有流 通 抵抗過於增大, 之丨 清; 況 〇 亂 流 促 進 用 凸部 係爲，可 藉 以隨機任意之 方 式 設 於 內 部 散 熱 片 之 寬 度 方向 ，亦可每 隔 一定間隔、例 如 可 爲 每 隔 2 個 而 設 於谷 底 部。 此外，設 於 1個山頂部、 或 是 谷 底 部 之 亂 流 促 進 用 凸 部之 數目，係 可 -5 爲卓一個、亦 可 爲 多 數 個 y 546462 五、發明說明（4) 設有多數個之情況下的凸部節距係可爲一定値、亦可爲隨 機任意。此外，將凸部多數設置於1個山頂部、或是谷底 部的情況下’爲不致使流通抵抗過於增大，而必須決定凸 部數目及節距。 上述內部散熱器，一般係藉由輥軋成形（r〇l 1 forming )而形成。在此情況下，亂流促進用凸部係爲，藉由於一 對成形輥筒之對應處所上設置用以形成亂流促進用凸部之 凹凸，而在內部散熱片本體成型的同時一倂獲得成形。 本發明之收容有內部散熱片之熱交換器用扁平管係未有 特別的限定’例如，亦可爲以電縫管所構成，亦可構成爲 由成對之具有扁平管部形成用凹部之多數對的盤狀金屬板 所形成之物，用以對向配合而以接合形成之扁平管部。此 外，在後者的情況下，設有隔開用凸條之兩側用以對向配 合於成對之盤狀金屬板以接合而形成，且將分別配設於2 個扁平管部之內部散熱片藉由本發明之內部散熱片而構成 的同時，將兩內部散熱片經由該等相鄰接之周緣部夾於兩 盤狀金屬板之隔開用凸條之間的連接埠而相互連接，而呈 一體構成之物亦可。 內部散熱片之山頂部及谷底部與扁平管內面的焊接，係 爲例如將內部散熱片及扁平管中至少一方以硬焊薄板 (b r a z i n g s h e e t )所形成，雖可於該薄板表面藉由已包 覆之焊材來進行，然而一般係爲僅將扁平板以藉由硬焊薄 板而形成。 546462 五、 發明說明 ( 5 ) 接 著 本 發 明 之蒸發器係具備有多數扁平管 1 係 爲 於 各 扁 平 管 中 收 容 有 本發明上述之內部散熱片、且 內 部 散 熱 片 之 整 體 山 頂 部 及 整體谷底部係於扁平管內面經 由 焊 接 之 物 者 〇 藉 由 上 述 蒸 發 器，以內部散熱片之亂流促進 用 凸 部 可 提 升 流 動 在 扁 平 管內之冷煤與流動在扁平管外 部 之 被 冷 卻 空 氣 之 間 的 熱 交 換效率，獲得更佳優良之性能 〇 本 發 明 之 蒸 發 器係爲，藉由成對之具有扁平 管 部 形 成 用 凹 部 之 多 數 對 的 盤狀金屬板所形成之物，用以 對 向 配 合 而 以 接 合 形 成 之 扁 平管部構成扁平管，而有所謂 的 積 層 型 蒸 發 器 的 情 況 0 [ 本 發 明 較 佳 實 施例之詳細說明】 第 1 圖 至 第 4 圖所示係本發明之實施例。在 圖 示 之 實 施 例 中 係 將 本 發 明適用於汽車用空氣調節器之 積 層 型 蒸 發 器 〇 第 1 圖 丨所 示 係汽車用空氣調節器之積層型蒸 發 器 之 整 體 圖 示 0 此 種 積 層 型蒸發器（1 )係具備有蒸發器 :核 :心 ( 10 丨） 係 爲 將 由 成 對 之各個盤狀金屬板（20 ) ( 20A ) 用 以 對 向 配 合 而 接 合 形 成之多數管狀構件（2 ) ( 2A ) 經 由 外 部 散 熱 片 ( 3〕 ) ，以接合所形成者。蒸發器核心 ( 10 ) 係 爲 藉 由 除 左 端 以 外 之管狀構件（2 )所構成，且 具 備 有 5 多 數 左 右 並 列 狀 之 前側扁平管部（22A )、多數 左 右 並 列 狀 後 側 扁 平 管 部 ( 22A )、使其連通前側扁平管部 -7- (22A .) 之 546462 五、發明說明（6 ) 各個上端部及各個下端部之前側上頂蓋部（22B )與前側 下頂蓋部（22B )、以及使其連通後側扁平管部（22A )之 各個上端部及各個下端部之後側上頂蓋部（22B )與後側 下頂蓋部（22B )左端之管狀構件（2A ) ’係具備有冷煤 導入通路（201 )與冷煤排出通路（202 )。而於該管狀構 件（2 A )之外面，係裝設具有冷煤導入管連接口（ 4 1)與 冷煤排出管連接口（ 42 )之管連接用區域（4 )。於頂蓋 部（22B )所要地方設置有間隔壁（圖示省略），由冷煤 導入管連接口（ 41 )經由冷煤導入通路（2041 )、且流入 後側上頂蓋部（22B )之左端部的冷煤，係以所定模式流 經全數頂蓋部（22B )及扁平管部（22A )後，由前側上頂 蓋部（22B)之左端部經由冷煤排出通路（ 202 )而形成爲 由冷煤排出管連接口（ 42 )排出。 第2圖所示，係構成除左端以外之管狀構件（2 )的2 片盤狀金屬板（20 )、以及被收容在其內部之內部散熱片 (5 )。盤狀金屬板（20 )係由在兩面上被焊材所包覆之 硬焊薄板所形成。於各盤狀金屬板（20 )之寬度中央部上 ，設有呈垂直之隔開用凸條（2 1 )，且於該凸條（2 1 )之 前後兩側成爲扁平管部形成用凹部（22 )。此外，各盤狀 金屬板（20 )上設置頂蓋部形成用凹部（23 )，係爲用以 連接於前後扁平管部形成用凹埠（2 2 )之上下兩端，且於 該凹部（2 3 )之底部鑽開有冷煤通過孔（24 )。但是，於 局部的盤狀金屬板（20 )上，在所要的頂蓋形成用凹部 546462 五、 發明說明 (7) ( 23 ) 之 底 部係無須鑽開冷煤通過孔（24 ) ，係藉 由 該 底 部 而 構 成 上 述間隔壁。並且，藉由將兩盤狀 金屬板 ( 20 丨） 對 向 接 合 而 形成前後2個扁平管部（22A)。 分別配置於2 個 扁 平 管 部 (22A)之內部散熱器（5)係爲 藉由本 發 明 之 內 部 散 熱 器 所構成，兩內部散熱片（5 )係 爲，該 等 相 鄰 周 緣 部 夾 在 兩盤狀金屬板（20)之隔開用凸 條（20 |) 之 間 、 且 經 由 連 結部（50 )相互連接，而形成一 體構成, 之， 吻 〇 如 第 2 圖至第4圖所示，本發明之內部散熱片 (5 ) 係 爲 藉 由 以 击曰 早比 乳成形所形成之橫向斷面波形之 鋁合金 板 所 形 成 被 收 容 在扁平管部（24)、且全數山頂 部（51 ) 與 全 數 谷 底 部 ( 52 )係被焊接在扁平管（22A ) 內面。 藉 由 此 種 內 部 散 熱 片（5)，在扁平管部（22A)內 形成於 、/· 刖 後 方 向 並列 之 多 冷煤通路（221)。並且如第3 1 圖及第 4 圖 所 示 1 於 內 部 散熱片（5)之多數谷底部（52 )上， 係 設 有 朝 向 該 等 接 合側與相對側之亂流促進用凸部 (53) 〇 上 述 內 部 散熱片（5 )係爲，將形成於橫 向斷面 波 形 之 鋁 合金 板 藉 由於所定長度切斷而形成後，於 上下重 疊 堆 積 多 數 片 而 暫 時性地進行保管。在此狀態下， 各個相 鄰 的 內 部散 熱 片 ( 5 )係爲因亂流促進用凸部（53 )的存 在 而 不 會 緊 密 接 合 。從而，可由重疊堆積的狀態下 一片片 的 取 出 內 部 散 熱 片 (5 )，而可藉以效率爲佳的狀 態進行 蒸 發 器 ( 1 ) 1之組裝作業。 如 第 3 圖所示，於前後各個內部散熱片 冬 (5 )中 設 有 546462 五、發明說明（8 ) 亂流促進用凸部（5 3 )之谷底部（5 2 )之數係爲5，此爲 相當於全數山頂部（5 1 )與全數谷底部（52 )相加之數 (=23 )之大約5分之1。設置有亂流促進用凸部（53 ) 之5個谷底部（52 )係如第3圖所示，以隨機的方式配置 於內部散熱片之寬度方向。於上述5個谷底部（52 )之亂 流促進用凸部（5 3 )之數係爲1〜5個。 如第4圖（b )所示，形成於亂流促進用凸部（5 3 )裏 側之凹部（54 )與扁平管（22A )內面之間所產生的間隙 ，係藉由焊材（6 )而塡塞（在第4圖（a )中，係省略焊 材（6 ))。亂流促進用凸部（53 )之內部散熱片長度方 向的尺寸（A )爲1mm，凸部（53 )之高度（B )爲0 . 4mm 〇 於上述蒸發器（1 )中，流經扁平管部（22A )內之冷煤 通路的冷煤，因係爲呈沸騰狀態，即使在一般情況下也呈 亂流狀態，然而，藉由內部散熱片（5 )之亂流促進用凸 部（5 3 )，可促進以更爲大程度之亂流狀態流動，藉此提 昇熱傳達效率。此外，冷煤並非於途中流入其他冷煤通路 (221 )，而是筆直地流入各個冷煤通路（221 )，因而減 少流通抵抗。 第5圖所示係本發明之其他實施例。於第5圖中，經由 連結部（50 )相互連接之前後各個內部散熱片（5 ) ’在 位於前後兩周緣部附近之3個谷底部（52 )上設有亂流促 進用凸部（53)。在上述3個谷底部（52)上，凸部（53) -10- 546462 五、發明說明（9) 之數目爲1〜3個。其他係與第1圖至第4圖所示之實施 例大致相同。 此外，上述實施例1並非僅限於例示，可在不超過記載 於申請專利範圍之本發明之特徵的範圍內進行適當的變更 ，當然可實施本發明。 【產業上利用之可能性】 如上所述，本發明係有利於具備有於內部配設內部散熱 片之扁平管的熱交換器之高性能化，特別係有利於如汽車 用空氣調節器之蒸發器般地蒸發器之高性能化。 圖式簡單說明 第1圖所示係在本發明之實施例中，汽車用空氣調節器 之積層型蒸發器的立體圖。 第2圖所不係構成管狀構件（tube element)之2片盤 狀金屬板、以及被收容於該等內部之散熱片的立體圖。 第3圖之（a )所示係內部散熱片之側視圖，（b )爲內 部散熱片之橫向斷面圖。 第4圖之（a )所示係將內部散熱片收容至扁平管之狀 帶的局部放大橫向斷面圖，（b )爲沿（a )圖之b - b線所 見之局部放大縱向斷面圖。 第5圖所示係本發明其他實施例，（a )爲內部散熱片 之側視圖，（b )爲內部散熱片之橫向斷面圖。 【圖式符號說明】 1 : 積層型蒸發器 546462 五、發明說明（10) 2、2A : 管狀構件 5 : 內部散熱片 10 ： 蒸發器核心 20 、 2〇A : 盤狀金屬板 2 1 ·· 隔開用凸條 22B ： 頂蓋部 22 : 凸部 22A ： 扁平管部 23 : 凹部 41 ： 冷煤導入管連接口 42 : 冷煤排出管連接口 50 ： 連結部 51 ： 山頂部 52 ： 谷底部 53 ： 亂流促進用凸部 201 ： 冷煤導入通路 2 02 ·· 冷煤排出通路 221 ·· 冷煤通路 -12-546462 V. Description of the invention (1; [Technical Field of the Invention] The present invention relates to an internal scatter sheet of a flat tube for a heat exchanger, and an evaporator using the internal heat sink and used as an evaporator of an air conditioner for an automobile. 〇 [Conventional technology] It is conventionally known in the evaporator of automotive air conditioners that the internal heat sink in the flat tube is used to expand the heat transfer area of the cold coal end. 〇 This internal heat sink is conventionally formed of a metal plate with a corrugated cross section and housed in a flat tube, and the top of the whole mountain and the bottom of the whole valley are welded to the inner surface of the flat tube. 5 of the internal radiator is by separating the top of the mountain from the bottom of the valley-also It is to reduce the heat sink fin pitch to increase the heat transfer area. However, it is difficult to manufacture the heat sink fin pitch beyond S 刖. In addition, even if it can be more fine-grained? Obviously te jw \ The method achieves the effect relative to more miniaturization. The system of the present invention is to provide an internal heat sink of a flat tube for a heat exchanger formed by a metal plate with a corrugated cross section, even if the pitch of the heat sink is not small. But it can improve the efficiency of heat transfer. Another aspect of the present invention is to provide an evaporator with improved performance by using the above-mentioned internal heat sink. [Invention of the Invention] Achieved by the present invention Internal heat sink of flat tube for heat exchanger-3 device 7 546462 V. Description of the invention (2) It is made of a metal plate with a corrugated cross section. Completed and housed in a flat tube ', and the top of the whole mountain and the bottom of the whole mountain are welded to the inner surface of the flat tube', which is characterized in that at least one of the top of the whole mountain and the bottom of the whole valley i: 'the direction and The turbulence-promoting protrusions on the opposite ends of the welded ends are turbulence-promoting protrusions, which are gaps formed between the recesses formed on the back side and the inner surface of the flat tube, and have a welding material Blocked things. In this way, if at least one of the top of the internal heat sink and the bottom of the full valley is provided with a turbulence-promoting protrusion facing the opposite end of the welded end, the flat tube accommodated by the internal heat sink The internally flowing fluid promotes the flow in a turbulent state by the turbulent flow promoting protrusions, thereby improving the efficiency of heat transfer. In addition, the turbulence-promoting convex portion is such that a gap generated between the concave portion formed on the back side and the inner surface of the flat tube has a size that can be sealed with a welding material. However, the majority of the fluid passages formed in the flat tube in parallel in the width direction are not in a connected state, so the flow resistance cannot be increased. Therefore, according to the present invention, even if the pitch of the fins is not reduced, the heat transfer efficiency can be improved by the turbulence-promoting convex portions, and a higher-performance flat tube internal heat sink for a heat exchanger can be obtained. In addition, secondary effects can be obtained by the turbulence-promoting protrusions. The series are as follows. That is, the internal fins formed by a metal plate are temporarily stored in a state where a large number of them are stacked above and below. However, when each internal fin is closely adhered, it is difficult to peel off, and there is a heat exchange. Assembler group 546462 V. Description of the invention (3) There is a risk of failure during installation. If the turbulent flow-promoting protrusions as described above are provided in the internal heat sink, even in the state where a plurality of layers are stacked above and below, each internal heat sink is not tightly attached, and the internal heat sink can be taken out one by one. The heat exchanger can be assembled with better efficiency. In addition, if the internal heat sink prevents the tight adhesion effect, the turbulence-promoting convex part is set at least on the inner diffuser sheet. The tops of the mountains and / or the bottoms of the valleys near the edges of both ends are preferred, thereby forming a plurality of internal heat sinks that can be easily peeled off one by one in a stacked state. In the flat tube for a heat exchanger of the present invention Among the internal fins, the dimension of the internal fins of the turbulent flow promoting protrusions in the longitudinal direction is preferably 1.1 mm, and the height of the convex portions is 0.2) 0.4 mm. The internal fins of the turbulent flow promoting protrusions. Length direction. Ruler If not up to 1 mm!, And a height of the convex portion of less than 0. 2mm, the promoter does not have to mention produce lift degree of heat transfer efficiency of the fluid turbulence. On the other hand, if the size of the internal fins of the turbulent flow promotion protrusion exceeds 1.5 mm y and the cylinder diameter of the bulge exceeds 0.4 mm, a recess formed on the inner side of the turbulence promotion protrusion is formed. The gap between the inner surface of the flat tube and the inner surface of the flat tube will not be blocked by the welding material. Therefore, the flow resistance will be too large, and it will be cleared. Arbitrary methods are provided in the width direction of the internal heat sink, and they can also be provided at the bottom of the valley at regular intervals, for example, every two. In addition, the number of turbulence-promoting protrusions provided on the top of a mountain or the bottom of a valley may be -5, one or a plurality of y. 546462 V. Description of the invention (4) A plurality of In this case, the pitch of the convex portion may be fixed or random. In addition, in the case where a large number of convex portions are provided on the top of a mountain or the bottom of a valley ', the number of convex portions and the pitch must be determined so as not to increase the circulation resistance too much. The internal heat sink is generally formed by roll forming. In this case, the turbulence-promoting convex portion is obtained by forming the ruggedness of the turbulence-promoting convex portion on the corresponding space of the pair of forming rollers, and is obtained at the same time as the internal fin body is formed. Forming. The flat tube system for the heat exchanger containing the internal fins of the present invention is not particularly limited. For example, the flat tube system for the heat exchanger containing the internal fins may be constituted by an electric slit tube, or may be formed by a plurality of pairs of flat tube-forming recessed portions. The objects formed by the opposing disc-shaped metal plates are used to form a flat tube portion that is mated with each other to form a joint. In addition, in the latter case, two sides of the protruding ribs are provided for mating to form a pair of paired disc-shaped metal plates for joining, and are disposed inside the two flat tube portions to dissipate heat. The sheet is constituted by the internal heat sink of the present invention, and the two internal heat sinks are connected to each other through the connecting ports between the adjacent convex portions of the two disk-shaped metal plates sandwiched by these adjacent peripheral edges, and It is also possible to form a unitary body. The welding of the top and bottom of the mountain of the internal heat sink and the inner surface of the flat pipe is, for example, formed by brazing a sheet of at least one of the internal heat sink and the flat pipe. However, it is generally formed by brazing a thin plate only with a flat plate. 546462 V. Description of the invention (5) Next, the evaporator of the present invention is provided with a plurality of flat tubes. One is to accommodate the above-mentioned internal fins of the present invention in each flat tube, and the entire mountain top and the entire valley bottom of the internal fin. Those attached to the inner surface of the flat tube through welding. With the above-mentioned evaporator, the turbulent flow promotion protrusions of the internal fins can enhance the cold coal flowing in the flat tube and the cooled air flowing outside the flat tube. The heat exchange efficiency between the two sides is better and better. The evaporator of the present invention is an object formed by a pair of disk-shaped metal plates having a plurality of pairs of flat tube portions forming recesses, The flat tubes formed by joining are used to form flat tubes, and there are so-called laminated evaporators. [Detailed description of the preferred embodiment of the present invention] Figures 1 to 4 show the embodiment of the present invention. . In the illustrated embodiment, the present invention is applied to a laminated evaporator of an air conditioner for an automobile. Fig. 1 shows the overall diagram of a laminated evaporator for an air conditioner for an automobile. 0 This laminated type The evaporator (1) is provided with an evaporator: a core: a heart (10 丨) is a plurality of tubular members (2) which are formed by pairing each pair of disc-shaped metal plates (20) (20A) for counter-mating and joining. (2A) through the external heat sink (3)) to join the formed ones. The evaporator core (10) is composed of a tubular member (2) other than the left end, and is provided with a majority of 5 side-by-side front flat tube portions (22A) and a majority of side-by-side rear flat tube portions (22A). ), Make it communicate with the front flat tube part -7462 (22A.) 546462 V. Description of the invention (6) Front upper cover part (22B) and front lower cover part (22B) of each upper end part and each lower end part And a tubular member (2A) which communicates with each upper end portion and each lower end portion of the rear flat tube portion (22A) and the upper end cover portion (22B) and the left end of the rear lower cover portion (22B). There are a cold coal introduction passage (201) and a cold coal discharge passage (202). On the outside of the tubular member (2A), a pipe connection area (4) having a cold coal introduction pipe connection port (41) and a cold coal discharge pipe connection port (42) is installed. A partition wall (not shown) is provided at a desired place of the roof portion (22B), and the cold coal introduction pipe connection port (41) passes through the cold coal introduction passage (2041) and flows into the rear upper cover portion (22B). The cold coal at the left end is formed in a predetermined pattern after passing through all of the cover portion (22B) and the flat tube portion (22A), and is formed by the left end portion of the front upper cover portion (22B) through the cold coal discharge passage (202). It is discharged through the cold coal discharge pipe connection port (42). As shown in FIG. 2, two disc-shaped metal plates (20) constituting a tubular member (2) other than the left end, and an internal heat sink (5) housed therein. The disc-shaped metal plate (20) is formed of a brazed thin plate covered with a welding material on both sides. On the width central portion of each disc-shaped metal plate (20), there are provided vertical partitioning ribs (2 1), and the front and rear sides of the ribs (2 1) become recesses for forming flat tube portions. (twenty two ). In addition, each disc-shaped metal plate (20) is provided with a recess (23) for forming a cover portion, which is connected to the upper and lower ends of the recesses (2 2) for forming the front and rear flat tube portions, and is provided in the recess ( A cold coal passage hole (24) is drilled in the bottom of 2 3). However, on a part of the disc-shaped metal plate (20), the desired recess for forming the top cover is 546462. 5. The bottom of the invention description (7) (23) does not need to drill the cold coal passage hole (24). The bottom part constitutes the partition wall. In addition, two flat metal plates (20 丨) are opposed to each other to form two flat tube portions (22A) at the front and rear. The internal heat sinks (5) respectively disposed in the two flat tube portions (22A) are constituted by the internal heat sink of the present invention, and the two internal heat sinks (5) are such that the adjacent peripheral edge portions are sandwiched between two plates The metal strips (20) are separated from each other by convex strips (20 |) and connected to each other via a connecting portion (50) to form an integrated structure. As shown in FIG. 2 to FIG. 4, The internal heat sink (5) of the invention is formed by forming an aluminum alloy plate with a transverse cross-sectional wave shape formed by striking earlier than milk, and is housed in a flat tube portion (24), and the top of the mountain (51) and The bottom of the whole valley (52) is welded to the inner surface of the flat tube (22A). With this type of internal heat radiating sheet (5), a plurality of cold coal passages (221) are formed in the flat tube section (22A) in a parallel direction in the rear direction of. In addition, as shown in FIG. 31 and FIG. 4, 1 is provided on the bottom portion (52) of most of the valleys of the internal heat sink (5), and a turbulence-promoting convex portion (53) is provided toward the joining side and the opposite side. 〇 The internal heat sink (5) is formed by cutting an aluminum alloy plate formed in a transverse cross-sectional waveform by a predetermined length, and then temporarily storing a plurality of sheets stacked on top and bottom. In this state, the adjacent inner heat radiating sheets (5) are not tightly connected due to the existence of the turbulence-promoting convex portions (53). Therefore, the inner heat-radiating sheet (5) can be taken out piece by piece in the state of overlapping and stacking, and the assembly operation of the evaporator (1) 1 can be performed in a state of better efficiency. As shown in FIG. 3, 546462 is provided in each of the front and rear internal heat sinks in winter (5). 5. Description of the invention (8) The valley bottom (5 2) of the turbulence-promoting convex portion (5 3) is 5 This is equivalent to approximately one-fifth of the number (= 23) added to the top of the whole number (5 1) and the bottom of the whole number (52). The five valley bottoms (52) provided with the turbulent flow promotion protrusions (53) are arranged at random in the width direction of the internal heat sink as shown in FIG. The number of the chaotic flow promotion protrusions (5 3) at the bottom of the five valleys (52) is 1 to 5. As shown in Fig. 4 (b), the gap formed between the recessed portion (54) on the inner side of the turbulent flow promotion convex portion (53) and the inner surface of the flat tube (22A) is formed by a welding material (6 ) And congestion (in Fig. 4 (a), the welding material (6) is omitted). The dimension (A) in the longitudinal direction of the internal fins of the turbulent flow promotion protrusion (53) is 1 mm, and the height (B) of the protrusion (53) is 0.4 mm. The cold coal in the cold coal passage in the pipe section (22A) is in a boiling state and is in a turbulent state even under normal circumstances. However, the turbulent flow promotion convex portion (5) of the internal heat sink (5) 5 3), can promote the flow in a more turbulent state, thereby improving the efficiency of heat transfer. In addition, cold coal does not flow into other cold coal passages (221) on the way, but flows straight into each cold coal passage (221), thereby reducing circulation resistance. Fig. 5 shows another embodiment of the present invention. In FIG. 5, the internal and external heat sinks (5) are connected to each other via a connecting portion (50), and a turbulence-promoting convex portion (53) is provided on three valley bottom portions (52) located near the front and rear peripheral edges. ). On the bottom (52) of the three valleys, the convex portion (53) -10- 546462 5. The number of the invention description (9) is 1-3. The other parts are substantially the same as the embodiments shown in Figs. In addition, the above-mentioned Embodiment 1 is not limited to the illustration, and appropriate changes can be made within a range not exceeding the features of the present invention described in the scope of the patent application, and the present invention can of course be implemented. [Possibility of industrial use] As mentioned above, the present invention is advantageous for high performance of a heat exchanger having a flat tube provided with internal fins therein, and is particularly advantageous for evaporation of an air conditioner for an automobile, for example. The performance of the evaporator-like evaporator. Brief Description of the Drawings Fig. 1 is a perspective view of a laminated evaporator of an air conditioner for an automobile in the embodiment of the present invention. FIG. 2 is not a perspective view of two disc-shaped metal plates constituting a tube element and heat sinks accommodated in the interior. Figure 3 (a) is a side view of the internal heat sink, and (b) is a cross-sectional view of the internal heat sink. (A) of Fig. 4 is a partially enlarged horizontal cross-sectional view of the internal heat sink accommodated in a flat tube-like band, and (b) is a partially enlarged longitudinal cross-section viewed along line b-b of (a). Illustration. Figure 5 shows another embodiment of the present invention. (A) is a side view of the internal heat sink, and (b) is a cross-sectional view of the internal heat sink. [Illustration of Symbols] 1: Laminated evaporator 546462 5. Description of the invention (10) 2, 2A: Tubular member 5: Internal heat sink 10: Evaporator core 20, 20A: Disk-shaped metal plate 2 1 ·· Parting projection 22B: top cover portion 22: projection portion 22A: flat tube portion 23: recessed portion 41: cold coal inlet pipe connection opening 42: cold coal discharge pipe connection opening 50: connection portion 51: mountain top portion 52: valley bottom portion 53: Convex part for turbulence promotion 201: Cold coal introduction passage 2 02 ·· Cold coal discharge passage 221 ·· Cold coal passage -12-